Clea Helen D'Etienne DuVall (born September 25, 1977) is an American actress, writer, producer, and director. She is known for her appearances in the films The Faculty (1998), She's All That; But I'm a Cheerleader; Girl, Interrupted (all 1999); Identity, 21 Grams (both 2003), The Grudge (2004), Zodiac (2007), Conviction (2010), and Argo (2012).

On television, she played Sofie in Carnivàle (2003–2005), Audrey Hanson in Heroes (2006–2007), Wendy Peyser in American Horror Story: Asylum (2012–2013), Emma Borden in The Lizzie Borden Chronicles (2015), Lara Cruz in Better Call Saul (2015–2017), Marjorie in Veep (2016–2019), and Sylvia in The Handmaid's Tale (2018–2022).